/**
 * @Author：xz
 * @Date：2023/9/5
 */
public class FinalTest {
    public static void main(String[] args) {
        User user = new User();
    }

}
class User {
    final int age;

    User(){
        age = 0;
    }

//    User(int age) {
//        this.age = age;
//    }
}